Pouring jig



Dec. 28, 1937. M, HQLHUT ET AL 2,103,531?

- POURING JIG A Filed Sept. 16, 1936 2 Sheets-Shee`-t ll (n/ij L2@ ,ZLeM BY A??? ENEY Dee. A28, 1937. M. HoLHUT ET A1. -2,103,531

POURING JIG -A f' f4 171,7l

VPatented Dec. 28, 1937 V'72,103,531 p vPoUnINor JIG stLouis,

V07.,"assignors to n 6;` H lvlaclnne"` & Motor Parts Co.,V St. Louis, Mo., fa corporationof Missouri i bearing is positioned.

Ourtinvention has for another object the pro-U vision of a pouringjig `or tool equipped with an air-'cooled molten metal retaining chamber and which is so constructed for association with standard parts cfal standard automobile engine block in such manner that the metal retaining to the poured bearing for shearing oifl excess metal substantially iiush with the marginal surface of the entire bearing structure.

And with the above and other objects in View, ourv invention resides in the novel features of form, construction, arrangement, and combination of parts presently described and pointed out in the claims.

In the accompanying drawings (2 sheets) Figure 1` is an elevationall View of,` a pouring jig constructed in accordance with and embodying our present invention, the jig being shown in co-operation witha bench-mounting for preparing' thev removable portion of an automotive main bearing; Y Y f Figure 2 is an end elevational view of the jig,

partially Vbroken away and in` section for disclosing its internalstructure; c ,Y

` Figure 3v is a detail sectional view of the jig, taken approximately ure 2;

Figure lV is-a fragmentary inverted plan view of the jig;

Figure 5 'is a fragmentary top' plan View of the 1g; Y

J Figure 6 is a fragmentary sectional view of a A slightly modified pouring-jig embodying our in-V vention, especially adapted for useA in pouring the stationary or xed'portion of anautomotive main bearing,in co-operation with the" automotive cylinder blookg'and Y` Y Figure 7 is a fragmentary inverted plan View of the" modified pouring jig of Figure 6. Y

Referring now in more detail andbyreference moved or shifted with respect along the line 3 3, Fig-Y4 cisely in a unitary horizontal plane;

Extending vertically upwardly from each of the respective shoulder-faces 5, .isa stud l, which, together with their corresponding shoulders 5, are so positioned with respect to each other that each stud 'l'will loosely t into a respectivestandard bolt hole o provided in the removablei shell or, as it is most frequently calledgbearing cap8 of a selected automotive main bearing. Thus, the bearing-cap 3, as shown in Figure l, may be placed down over, the studs l into iiush- `wise supporting engagement with the upper faces i5 on the shoulders 5. f i Y v In` present automotive Vengineering practice, bearing. caps, such as the cap 8, are Vprovided with accurately machined radially arcuate, upstanding positioning-shoulders 8a and 8b, as seen in Figure l, which t preciselysin machined grooves y, g', (as best seen in Figure 6) formed in the stationary or journal part of the main bearing, and which may be availed of, in accord- 'I'hevpourng jig or tool preferablycast'central main or body-portion 9 provided withv diametrically opposed outwardly horizontally extending vsleeves lili, i l, which are internallythreaded, as shown, to receive suitable handle members l2, i3.

vFormed inthe bodyeportion 9, is a pair of spaced .openetop symmetrically positioned molten metal receiving chambers `ci' reservoirs ii, lo, `preferably vofsome'what elliptical shape in plan View; as best seen'in Figure 5, and whose side walls t extend -cbliquely inwardly and downwardly substantially a's shown in FiguresY called funnel-shape or gate formation for facilif tatingmetal'iiow, each chamber i4, i5, being also providedwith a plurality of outlets Vor spouts i6 which open to the under face Il of the bottom wall VI'I of the body 9; 1 i Y Also `formed in, Vand extending transversely vproper B comprises a Y 2 through, the body-portion 9, is an air cooling-passage I8, and disposed centrally of the body-portion 9 between the chambers |4, I5, are vertically extending axially aligned apertures I9, 20, for rotatively receiving a pivot-bolt 2|, as best seen in Figure 1.

The bottom wall I1 of the body-portion 9 is provided with what may be described as an outwardly presented marginal extension whose side face includes opposed parallel portions y, arcuately connected by opposed end portions r and 1", as best seen in Figures 4 and 5, all for purposes presently more fully appearing.

Threaded upon the lower end of the pivot-bolt 2| for rotative flush-wise engagement with the under face |1 of the bottom wall I1 of the body structure 9, is a mold member or former 22, which is provided at its opposite ends with laterally outwardly projecting cylindrical enlargements or barrel-extensions 23, 24, upon which are mounted for shiftable movement sleeves 25, 26, formed with outwardly presented annular flanges or collars 21', 28, for embracingly receiving the inner ends of helical springs 29, 36, coiled on the extensions 23, 24, and impinging at their respective outer ends against circular end-plates or disks 3|, 3|, firmly secured on the extensions 23, 24, by suitable bolts 32, 32, as best seen in Figure 2.

The portion or section 33 of the former 22 intermediate the barrels or extensions 23, 24, which is engaged by the bolt 2|, is semi-circular in cross-section having a radius equal to the desired inside radius of the bushing or bearing to be poured and molded, and having a flat upper marginal face 33 for snug flush-wise engagement with the under flat face I1' of the bottom wall al1 o the body structure 9, the section 33 being also provided with a centrally disposed peripheral ridge 33" for forming the usual oil channel in the finished bearing. 1t should be noted that, although the oil-channel-forming ridge 33l is shown here as a simple semi-circular structure, other shapes and conformations may be similarly provided and utilized.

The sleeves 25, 26, as also best seen in Figure 2, are axially spaced from the body structure 9 to provide channels a, b, peripherally around the outside of the chambers I4, I5, for the free circulation of air, the sleeve members 25, 26, being also provided at their respective inner ends with semicircular bearing contacting shoulders 34, 35, for slidable engagement along their upper marginal faces 36, with the under face I1 of the bottom wall I1 of the body structure 9 and for also abuttingly engaging at their respective inner side faces 36 the perpendicular marginal or side faces of the main bearing, not shown, in a manner presently described.

Forming part of the sleeves 25, 26, and disposed diametrically between the outer end-flanges 21, 23, and the inner contacting shoulders 34, 35, respectively, as best seen in Figures 2 and 3, are socalled plate-segments or extensions 31, 31, having fiat under faces 38, 38, for slidably engaging the fiat upper marginal face 33' of the former or mold 22, and being provided with side shoulder faces y', for abutting engagement with the shoulder faces :12, y, respectively, of the body-portion 9.

Thus, in utilizing the tool or jig for pouring and molding the bushing in the removable portion of an automotive main bearing or bearing-cap, as it is customarily called, the body structure 9 is pivoted about the bolt 2| with respect to the former 22, whereupon the faces a: and y of the body structure 9 move angularly away from the faces y', of the sleeves 25, 26, as indicated in dotted lines in Figure 4, thereby forcing the sleeves 25, 26, longitudinally outwardly along the barrel extensions 23, 24, against the tension of the helical springs 29, 3|), and correspondingly widening the distance or space between the contacting shoulders 34, 35.

The bearing cap 8 is then positioned upon the studs 1 of the bracket 3, as above described, and the pouring jig placed downwardly thereupon in such manner that the intermediate or central section 33 of the former 22 lies within the bearing cap. The body-structure 9 is then pivoted reversely toits original position, whereupon the end arcuate faces r, r', thereof will move into positioning engagement between the upstanding shoulders 8a, 8b, of the bearing cap 8, and the sleeves 25, 26, will be yieldingly urged by the springs 29, 39, into tight abutting engagement with the side faces 8 of the bearing-cap. Since the normal distance between the contacting shoulders 34, 35, is precisely equivalent to the width of the bearing-cap y', of the sleeves 25, 26, will consequently return to normal abutting engagement with the faces sc, y, of the body structure 9, as above described, thereby accurately positioning the pouring jig both longitudinally and transversely upon the bearing-cap 8.

Further, since the intermediate or central portion 33 of the former 22 is externally shaped exactly to correspond to the desired inside contour of the bearing bushing being poured and molded, it Will be evident that the external peripheral surface of the former 22 will be spaced radially from the inside peripheral surface of the bearing-cap 8 a distance equal to the desired thickness of the bearing bushing when poured. Similarly, the faces of the contacting shoulders 34, 35, define the perpendicular end faces of the bearing bushing when poured.

Thus positioned, the entire assembly is heated with a torch or other suitable means -until hot enough to receive the Babbitt or bearing metal, whereupon the molten metal is poured into the chamber I4 of the body structure 9 and courses down through the openings or spouts I6 thereof into the space between the former 22 and the bearing-cap 8, filling such space entirely and flowing upwardly through the other openings or spouts I6 in the reservoir I5, sufficient molten metal being poured into the chamber I4 to fill both chambers I4 and I5 for a substantial distance above the spouts or openings I6 to insure complete formation of the bearing bushing.

By reason of the fact that air may freely circulate around the body structure 9 through the air passage IB and the channels a, and b, very rapid efficient cooling of the entire assembly will occur, and the molten metal will solidify without any appreciable waste of time.

As soon as the metal has solidified, the handles I2, I3, are firmly grasped and the body structure 9 sharply pivoted about the pivot pin 2|, which action simultaneously accomplishes several important functions. In the first place, the under face I1 rides over the upper marginal face 33 of the former 22 and accurately shears off the bearing metal in the bushing from the so-called risers or little integral necks or chimneys of metal left in the spouts I6 of the body structure 9. Secondly, such shearing action tends to move the body structure 9 and the former 22 very 8, the shoulder faces slightly, but nevertheless perceptibly, away from each other relatively along the pivot bolt 2|,

which is sufficient to initially ram home theV bushing. Thirdly, the pivoting movement of the body structure 9v forces the sleeves 25, 26, outwardly along the barrel-extensions 23, 24, away from the side faces of the bushing. Finally, as the air rushes in against the interior of the former 22 and the bearing-cap 8, the heated members cool somewhat Vand contract away from In pouring the bushing for the stationary or journal part of a main bearing, the modified form of pouring jig shown in Figures 6 and 7 is utilized. Such modified form of jig is in all respects of the bearingcap 8 previously described and similarly lt into the radially arcuate grooves y, y', formed in the cylinder block for engagingly receiving the shoulders 8a, 8b, of the bearing-cap 8.

Thus, in pouring the bushing for the stationary or journal bearing, the body structure 9', as

When the pouring jig has been removed from the bearing structure C, the bearing-cap 8 may be installed thereon for subsequent line-boring in any conventional manner.

It will be understood that changes and modications in the form, construction, arrangement,

" and combination of the several parts of the tool may be made and substituted for those herein shown and described Without'departing from the nature and principle of our invention. Y

Having thus described our invention, what we claim and desire to secure by LettersfPatent is: 1.V A pouring jig adapted Vfor cooperation with an automotive-bearing support structure to provide a bearing-forming mold, said jig comprising a former having a flat upper face and bodilyV the upper face of the former and being provided engaging at its under face Y with a plurality of laterally spaced apertures of diametrical size substantially equivalent to the transverse Width of the mold cavity, said aperthe plane of upon rotary movement of 2. A pouring jig adapted for cooperation with an automotive-bearing support structure to provide a bearing-forming mold, said jig comprisformer spring-pressed sleeves mounted for yielding movement lengthwise on said arms, said sleeves having opposed shoulders for abuttingly Vengaging the bearing-supporting structure in the formation of mold'cavity end Walls and a'pourmounted intermediate the spectively,

tremities cross-connected V position thereby.

3. VA pouring jig adapted for cooperation With an automotive-bearing support structure to proforming a substantially hemicylindrical mold-cavity, comprising a substantially hemi-cylindrical former having a flat upper Vstraight line, contiguous to straight edges of the mold-cavity, and of diametrical extent substantially equal to the transverse dimension of said the mold-cavity to shear off the poured bearing metal upon rotary movement of the pouring cup.

Y MICHAEL I-IOLHUT.

Y YWALTER, G. VOLLMER. 

